501 results about "Dry mixing" patented technology

The invention discloses ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components in percentage by mass: 15%-25% of cement, 3%-6% of nano SiO2, 30%-35% of fly ash or steel slag powder, 35%-40% of recycled aggregate, 1%-4% of fiber, 0.5% of a microbial remediation agent and 1%-3% of nano TiO2. The preparation method comprises the following steps: S1, pretreating the recycled aggregate; and S2, packaging the microbial remediation agent: mixing the bacillus pasteurii spores with calcium lactate, and wrapping the mixture in calcium phosphate microspheres. S3, step-by-step stirring; S3.1, dry mixing: uniformly stirring the cement, the fly ash, the nano SiO2, the nano TiO2 and the recycled aggregate; s3.2, wet mixing is carried out, water solution fibers containing the polycarboxylic acid water reducing agent are added, uniform stirring is carried out, and the water-binder ratio of the water solution containing the polycarboxylic acid water reducing agent is 0.18; s3.3, final mixing: adding the packaged microbial remediation agent, and uniformly stirring; and S4, directional curing: performing steam curing at 80 DEG C for 48 hours, performing ultraviolet irradiation, and performing constant-temperature and constant-humidity curing for 7 days. The ultra-high performance concrete has the effects of low cost, low carbon emission, multi-function integration and repeatable crack self-repairing.

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The preparation method comprises the following steps: 1, dispersing an iron source, a phosphorus source, a lithium source, a carbon source, a dispersing agent, an element doping agent and a solvent in proportion, dividing the dispersed slurry into three parts of slurry A, B and C in proportion, respectively grinding the three parts of slurry, and respectively carrying out spray drying; 2, pre-sintering the three parts of spray materials at different temperatures, and crushing the pre-sintered materials; and step 3, mixing the crushed pre-sintered materials so as to realize multi-stage grain composition. Carrying out dry mixing on a carbon source and the pre-crushed material according to a certain mass ratio; and 4, carrying out secondary sintering, crushing and demagnetizing on the mixed material to obtain the multi-stage grading high-compaction lithium iron phosphate positive electrode material. According to the invention, primary sintering material grain grading and secondary carbon coating and sintering strengthening are realized through graded particle size design, and the compaction density and the specific capacity of the lithium iron phosphate positive electrode material are synergistically improved.

The invention discloses a high-dosage RAP recycled asphalt mixture and a preparation method thereof, and the method comprises the following steps: step 1, carrying out homogenization treatment on an epoxy resin system and a rubber-asphalt composite system according to a weight ratio of 1: 5-1: 30 to obtain a composite modified asphalt system; 2, preheating the waste asphalt pavement material to 110-130 DEG C, performing dry mixing, adding a petroleum ether regenerant, heating to 150-170 DEG C, and performing dry mixing again to obtain a mixture 1; step 3, preheating new fine aggregate, coarse aggregate and steel slag in batches, adding into the mixture 1, and carrying out dry mixing to obtain a mixture 2 with a primary grading framework; step 4, adding the composite modified asphalt system prepared in the step 1 into the mixture 2, and performing wet mixing to obtain a mixture 3; and step 5, homogenizing the mixture 3 to finally obtain the target recycled asphalt mixture. The invention aims to realize high-mixing-amount recycling of the waste asphalt pavement material.

The invention discloses a composite conditioner for acid soil of slope cropland and application of the composite conditioner. The conditioner comprises the following components in percentage by mass: 12%-18% of calcium peroxide, 18%-32% of a buffer mineral compound, 1.5%-3.0% of an anti-scouring controlled-release material, 10%-25% of a nutrient carrier and fertilizer, 0.5%-3.0% of a binder and a granulation aid, and the balance of inert filler and water. The preparation process comprises the steps of dry mixing, granulation, drying and coating. The product provided by the invention can realize high residue of CaO and stable pH under the condition of heavy rainfall of slope cropland, effectively inhibit the pH fall of acid soil, reduce aluminum toxicity and reduce nutrient loss. By controlling the content and proportion of the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material, the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material have a synergistic effect in a slope cropland environment, so that not only is the initial rapid acid inhibition capability ensured, but also the lasting pH stability and high residual rate are realized through buffer and controlled-release technologies.

The invention relates to a composite hydroxypropyl methylcellulose skeleton sustained-release material and a preparation method thereof, and belongs to the technical field of drug sustained release. The sustained-release material is prepared from 70 to 90 parts of hydroxypropyl methylcellulose (HPMC), 10 to 20 parts of sodium alginate, 8 to 15 parts of chitosan, 0.1 to 0.2 part of Omega-3 fatty acid, 0.05 to 0.06 part of vitamin D, 2.5 to 5 parts of soluble calcium salt-zinc salt composite cross-linking agent, 0.5 to 1.5 parts of hydrolyzable cross-linking agent, 3 to 10 parts of enzyme sensitive auxiliary material, 1 to 5 parts of pore-foaming agent and 2 to 8 parts of hydrophobic blocking agent. The preparation method comprises the steps of raw material pretreatment and dry mixing, active component dispersion liquid preparation, wet granulation and primary cross-linking, secondary cross-linking and drying, vacuum drying and size stabilization, curing and packaging and the like. The sustained-release material provided by the invention has the advantages of controllable drug release rate, good mechanical strength and biodegradability, is suitable for sustained-release delivery of Omega-3 fatty acid, vitamin D and other active components, and can improve the bioavailability and stability of drugs.

The invention discloses modified cement-water glass slurry and a preparation method thereof, and belongs to the technical field of building material preparation. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 50-70 parts of Portland cement, 20-35 parts of a water glass solution, silica fume, modified nano-silica, an early strength agent and the like, carrying out dry mixing on solid powder, stirring with part of deionized water to form base slurry, adding the water glass solution and the rest deionized water, and carrying out high-speed dispersion to obtain a slurry; and finally, carrying out ultrasonic treatment for 10-15 minutes at the frequency of 20-40 kHz and the power of 300-500 W. Wherein the early strength agent is compounded by triethanolamine and sodium sulfate according to the ratio of 1: 2-1: 3. According to the method, through raw material compounding and process optimization, the dispersity, the early strength and the crack resistance of the slurry are improved, and the method is mainly used for grouting operation in the field of construction engineering such as foundation reinforcement and water prevention and leakage stoppage.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a biomass reinforced cement-based thermal insulation wall material and the wall material. The preparation method comprises the following steps: (1) crushing wood fibers, putting the crushed wood fibers into a NaOH solution, washing with water and drying; (2) carrying out dry mixing on cement, the modified wood fiber, nano SiO2 particles and calcium stearate; (3) diluting hydrogen peroxide with warm water, adding into the mixture, and stirring; (4) injecting the foaming slurry into a mold, and vibrating; and (5) steam curing. Through a collaborative technology of fiber surface modification, nano-particle regulation and control and hydrophobic layer construction, the comprehensive performance breakthrough of the fireproofing grade of A1 grade, the heat conductivity coefficient of 0.048-0.055 W / (m.K) and the compressive strength of 1.2-1.8 MPa is realized. The energy consumption is reduced by 70% through the low-temperature steam curing process, the proportion of agricultural waste is larger than or equal to 30%, the carbon emission intensity is smaller than or equal to 150 kgCO2 / m < 3 >, and the requirement for green buildings is met.

The invention belongs to the technical field of negative carbon building materials, and particularly relates to a multi-element solid waste negative carbon cement-based material and a preparation method thereof. The material is prepared from the following components in parts by weight: 10 to 320 parts of carbonized carbide slag, 0 to 240 parts of uncarbonized carbide slag, 25 to 640 parts of calcined coal gangue, 25 to 800 parts of Portland cement, 6 to 320 parts of silica fume and other pozzolanic mineral admixtures and 30 to 800 parts of mixing water. The preparation method comprises the following steps: carbonizing the carbide slag until the content of calcium carbonate is more than or equal to 90%, and calcining and activating the coal gangue at 700-800 DEG C; all the powder raw materials are subjected to dry mixing, water is added for segmented stirring, and standard curing is performed after pouring forming. The carbonized carbide slag is used for replacing limestone to achieve carbon sequestration, the calcined coal gangue is used for replacing calcined clay, natural resources are prevented from being exploited, the cement clinker replacement rate of 70% is achieved through the synergistic effect of multi-element solid waste in a low clinker system, the material has excellent mechanical and durability, and carbon emission and resource consumption are remarkably reduced.

The invention relates to an agglomerated ceramic abrasive which is prepared from the following raw materials in percentage by weight: 25-30% of a ceramic bond, 65-70% of diamond micro-powder, 1-3% of titanium powder, 2.5-5% of nitrate, 0.3-0.5% of nickel sulfate and 1-3% of aluminum zirconate, and is prepared by the following steps: adding water into the raw materials, uniformly mixing, and grinding; and then carrying out spray granulation, impurity drying and sintering to obtain the agglomerated ceramic abrasive material. Compared with a common ceramic bond diamond agglomerated abrasive material, the agglomerated ceramic abrasive material prepared by the method has the advantages of high hardness, uniform particle distribution, good grinding performance and the like. When the agglomerated ceramic abrasive is used for polishing marble tiles, no obvious scratches appear on the surfaces of the tiles, the surface consistency is good, and the polishing efficiency of the marble tiles is high.

The invention discloses a carbide slag fly ash concrete aerated block and a preparation method thereof, and belongs to the technical field of resource utilization of building materials and solid waste. The aerated block comprises the following raw materials: carbide slag, fly ash, gypsum, Portland cement, aluminum powder paste, a nano core-shell structure calcium-aluminum-silicon polymer and a zwitterionic foam-stabilizing polymer, the raw materials have a specific weight part range. Wherein the nano core-shell structure calcium-aluminum-silicon polymer is prepared by dispersing fly ash in water to form slurry, reacting the slurry with sodium silicate and a sodium metaaluminate solution in sequence, then adding calcium nitrate and a zinc sulfate solution for continuous reaction, and carrying out separation, washing, drying and grinding; the zwitterionic foam-stabilizing polymer is prepared by polymerizing a monomer in a solvent, precipitating and separating out, quaternizing, activating carboxyl crosslinking, dialyzing and purifying, and freeze-drying. All the steps relate to process parameters such as dry mixing time, stirring time, curing temperature, pressure and time, and the performance of the aerated block is improved through component optimization and preparation process improvement.

The invention discloses a recycled aggregate concrete lightweight partition board and a manufacturing method thereof, cement, coarse aggregate, fine aggregate, pearl grains and fibers are subjected to dry mixing together to form a mixture; mixing an adhesive and a first part of water, and adding the mixture into the mixture to form a first mixture; after CaCl2 and NaCl are mixed with a second part of water, a plasticizer and a foaming agent are added, and after foaming is completed, a second mixture is formed; performing dry mixing on the second mixture and the first mixture to obtain a concrete mixture, and curing to obtain the partition board. According to the invention, the biological waste shells are applied to the concrete, and the construction waste aggregate is used for replacing the natural gravel aggregate in the traditional cement-based partition wall board, so that the renewable and environment-friendly concrete partition wall board is prepared, meanwhile, the material ratio and the preparation method are simple, solid wastes are effectively utilized, the consumption of non-renewable resources is reduced, and the cost is reduced. Popularization and application are facilitated.

The invention belongs to the field of fiber reinforced composite materials, and provides an SCA modified basalt fiber cement base and a preparation method thereof.The preparation method comprises the following steps that basalt fibers are pretreated; a gamma-aminopropyltriethoxysilane solution, a gamma-glycidyl ether oxypropyltrimethoxysilane solution and a gamma-methacryloyloxypropyltrimethoxysilane solution are prepared, and the dried basalt fibers are soaked in the solutions respectively to be modified; naturally airing at room temperature after soaking, drying in an air dry oven, cooling to room temperature, and sealing and storing; carrying out dry mixing on the modified basalt fiber, ordinary Portland cement, sand and an additive to prepare an SCA modified basalt fiber cement base; by adopting different SCAs and introducing additional reaction functional groups, the interface bonding strength between the basalt fibers and a cement matrix is improved, and the problem of non-uniform fiber dispersion is solved, so that the comprehensive performance of the material is improved.

The invention relates to a negative electrode slurry mixing method which comprises the following steps: adding a powder material into a feeding hole of a double-screw extruder for dry mixing, and conveying the dry-mixed powder material into the double-screw extruder for pre-kneading; deionized water is added for wetting, the flow of the deionized water is controlled to be increased firstly and then reduced, and wet powder is formed; adding deionized water for kneading, and controlling the flow of the deionized water to be increased and then reduced to form kneaded powder; adding SBR (Styrene Butadiene Rubber) and deionized water, and obtaining semi-finished slurry from a discharge hole of the double-screw extruder; introducing the semi-finished slurry into a homogenizer for dispersion; and pumping the slurry dispersed by the homogenizer into a dispersion kettle for dispersion and defoaming to obtain the negative electrode slurry. For large-particle-size graphite, the flow of deionized water is adjusted step by step, the side feeding solid content is gradually increased, the grinding effect is improved, the properties such as the particle size, fineness and sedimentation of slurry are optimized, and the coating stability and the pole piece peeling strength are improved.

The invention discloses a high-water-content large-dosage titanium gypsum-based flow-state curing material as well as a preparation method and application thereof, and belongs to the technical field of industrial solid waste resource utilization and building materials. According to the material, 50-70 parts of titanium gypsum, 15-30 parts of slag / fly ash and 5-15 parts of alkaline residue / carbide slag are used as main raw materials, and 0.1-1 part of xanthan gum is used as a flow state regulator as an auxiliary material. The material has high fluidity and self-compaction performance, the mechanical strength (7-day compressive strength is larger than or equal to 5 MPa) and the water stability (the water stability coefficient is larger than or equal to 0.7) of titanium gypsum can be remarkably improved, and meanwhile the leaching concentration of solidified heavy metal ions is lower than a standard value. The preparation method comprises the processes of raw material pretreatment, dry mixing, wet mixing and maintenance, is suitable for the fields of roadbed filling, building 3D printing, mine backfilling and the like, and realizes collaborative development of solid waste recycling and low-carbon building materials.

The invention relates to anti-crack plant fiber concrete and a preparation method thereof, and belongs to the technical field of building materials. The anti-crack plant fiber concrete is prepared from cement, fine aggregate, coarse aggregate, modified coconut fiber, mineral powder, fly ash, a water reducing agent, an air entraining agent, an expanding agent and water as raw materials. The preparation method comprises the following steps: adding insoluble dry materials into a forced mixer, carrying out dry mixing to obtain a mixture, dissolving the water-soluble admixture with deionized water, carrying out uniform stirring, adding the obtained mixture into the mixture, and carrying out wet mixing to obtain a concrete mixture. According to the preparation method disclosed by the invention, the anti-crack concrete is prepared from the renewable coconut fibers, so that the dependence on synthetic fibers and steel is reduced, the carbon emission is reduced, and the preparation method is low-carbon and environment-friendly; the prepared concrete material is not easy to crack, and has good impact resistance and shear resistance.

The invention belongs to the technical field of battery materials, and provides an LATP solid electrolyte and a preparation method and application thereof.The preparation method comprises the steps that an LATP solid raw material, inorganic weak acid powder and organic alcohol powder are subjected to dry mixing, the organic alcohol powder comprises at least one of polyvinyl alcohol, polyethylene glycol or polypropylene glycol, and a mixed material is obtained; and sintering the mixed material to obtain the LATP solid electrolyte. Organic alcohol powder and inorganic weak acid powder are adopted to neutralize the acid-base properties of a phosphorus source and a lithium source, so that efficient, mild and uniform reaction is effectively ensured; long-time wet ball milling using a dispersion medium is replaced by dry mixing, so that the phenomena of non-uniform dispersion and segregation of various raw materials caused by an organic dispersion medium are avoided, the situation that the granularity difference value of the raw materials is enlarged due to long-time ball milling is avoided, and the consistency of the raw materials is effectively improved.

The invention discloses a goaf filling material based on coal slime and a carbon sequestration method. The goaf filling material comprises the following steps: preparing a composite activator and a plurality of pretreated coal slime, steel slag, superfine slag powder and desulfurized gypsum raw materials; the preparation method comprises the following steps: mixing coal slime, steel slag, superfine slag powder, desulfurized gypsum raw materials and a composite activator in proportion, putting into a closed reaction kettle, and carrying out dry mixing and sufficient stirring; adding a proper amount of water into the dry-mixed raw materials according to a solid-to-liquid ratio of 7: 3, and stirring the water and the raw materials through a reaction kettle until the water and the raw materials are fully mixed to form a strong alkali mixture; filling CO2 gas into the reaction kettle, carrying out primary mineralization reaction, and stirring in the reaction kettle to obtain a paste filling material; conveying the paste filling material to a goaf through a pump body, and performing filling operation according to a preset filling process; and after the filled paste filling material is initially set, secondary mineralization reaction is carried out, supercritical CO2 gas is injected into the paste filling material through the pre-buried pipeline, residual alkaline substances in the paste filling material react, and a compact anti-seepage structure is formed.

The invention relates to the technical field of graphite preparation processes, in particular to a preparation process of high-purity isostatic pressing graphite, which comprises the following steps: crushing calcined petroleum coke or pitch coke raw materials, carrying out primary grinding, carrying out dry mixing on the raw material powder obtained by the primary grinding, and then adding qualified modified pitch for wet mixing to prepare a paste material; performing secondary grinding to obtain paste powder, performing isostatic compaction, and performing pressure relief to obtain a green body; then the green body is placed in a roasting furnace to be vacuumized, nitrogen is introduced for heating and roasting, the temperature gradient of each temperature measuring point is obtained in the roasting process, the frequency domain characteristic difference between the different temperature measuring points in the roasting furnace is calculated, the temperature gradient difference is obtained, then the heating rate in the roasting process is controlled and adjusted, and a roasted product is obtained. And graphitizing and purifying the roasted product to prepare the high-purity isostatic pressing graphite. The preparation method can improve the preparation quality of the isostatic pressing graphite.

The invention provides modified lithium iron phosphate positive electrode slurry and a preparation method thereof.The preparation method comprises the steps that a lithium iron phosphate positive electrode material, a binder PVDF and a first conductive agent are subjected to dry mixing, and a first premix is obtained; adding an organic solvent into the first premix, and stirring for the first time to obtain a second premix; and adding a second conductive agent, an adhesive PVP and an organic solvent into the second premix, and carrying out second stirring to obtain the modified lithium iron phosphate positive electrode slurry. In the preparation process of the modified lithium iron phosphate positive electrode slurry, the binder PVP is added, the binder PVP not only can enable the active substance and the electrode current collector to be bonded together, but also after the binder PVP is added, the viscosity change of the slurry within the preset time is small, and the viscosity stability of the modified lithium iron phosphate positive electrode slurry is further improved. In addition, in the preparation process of the modified lithium iron phosphate positive electrode slurry, the preparation steps are simplified, the production time is shortened, and the production efficiency is improved.

The invention discloses an anti-splashing anhydrous stemming and a preparation method thereof, and belongs to the field of refractory materials for ferrous metallurgy. The anti-splashing anhydrous stemming comprises the following raw materials: anhydrous stemming of zirconia sol modified phenolic resin and gradient mullite coating silicon carbide particles, and the balance of high bauxite clinker, brown aluminum oxide, coke powder, asphalt, a dispersing agent and a defoaming agent. Wherein the zirconia sol modified phenolic resin is prepared by the following steps: reacting phenol with formaldehyde to generate a linear prepolymer, adding an alkali solution for modification, adding zirconium n-butoxide, reacting, and carrying out reduced pressure distillation; the gradient mullite coating silicon carbide particles are prepared by using silicon carbide as a matrix, dispersing the silicon carbide in aluminum hydroxide sol, adding tetraethoxysilane, and carrying out hydrothermal heat preservation and high-temperature calcination. The preparation method comprises the steps of dry mixing, wet mixing, compression molding, curing and the like. The stemming is high in high-temperature bonding strength and good in thermal shock resistance, molten iron splashing can be effectively inhibited, and the service life of a tap hole is prolonged.

The invention provides a sulfide all-solid-state battery positive electrode membrane as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries. Specifically, the method comprises the following steps: carrying out dry-process mixing on positive electrode component raw materials, and then carrying out hot rolling to obtain a positive electrode film; wherein the positive electrode component raw materials comprise a positive electrode active material, sulfide solid electrolyte, a conductive agent and polytetrafluoroethylene. According to the preparation method, the positive electrode film is prepared by taking polytetrafluoroethylene as a unique bonding component through the technological processes of dry mixing and hot rolling, so that the stress change caused by volume expansion of the positive electrode is effectively inhibited, and the positive electrode capacity is exerted under the load of a high electrode active material; and the preparation process is simple and easy to implement and low in cost, and has good generalizability and application prospects.

The invention discloses a modified polyarylester fiber asphalt mixture and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating fibers; (2) preparing a silane coupling agent; (3) treating the fibers with a coupling agent; (4) weighing and chopping the modified fibers; (5) aggregate and fiber dry mixing; and (6) preparing the asphalt mixture. According to the invention, the surface of the polyarylester fiber is treated by using a detergent, a previous oiling agent is removed, and then the fiber is treated by using a silane coupling agent, so that the surface activity of the fiber is improved, and the compatibility of the polyarylester fiber as a fiber stabilizer in an asphalt mixture is improved; the polyarylester short fiber asphalt mixture is prepared by controlling the length of the polyarylester short fibers and the mixing amount of the polyarylester short fibers in the matrix asphalt and combining a manufacturing process of firstly dry mixing, then wet mixing and adding the short fibers for multiple times, and the defects of insufficient rutting resistance and poor water damage resistance of a traditional asphalt mixture are overcome.

The invention discloses an anti-cracking calcium silicate board and a preparation method thereof, and relates to the technical field of light building materials. The method comprises the following steps: carrying out ball milling, acid pickling and silane coupling agent surface modification on quartz sand to obtain alkylated quartz sand; and carrying out dry mixing on the mixture, metakaolin, silica fume and cement. The linen fiber is subjected to alkali treatment and hydroxyethyl acrylate graft modification, and the PVA fiber is subjected to silane coupling agent and nano silicon dioxide coating treatment. Dispersing graphene oxide, carboxylated styrene-butadiene emulsion and other assistants in water, adding the dry mixture, uniformly stirring, and then adding the two modified fibers to prepare mixed slurry; and finally, carrying out pressure forming, pre-curing, high-pressure steam curing and drying to obtain a finished product. Through substrate silanization, fiber grafting / nanocrystalline seed modification and synergistic introduction of graphene oxide and elastic emulsion, the interface bonding strength and toughness are remarkably enhanced, crack initiation and propagation are effectively inhibited, and the plate has excellent cracking resistance.

The invention relates to the technical field of conductive materials, and discloses ECC concrete based on carbon black doping and a preparation method and application thereof.The preparation method includes the following steps that cement, slag, quartz sand, silica fume and limestone powder are subjected to dry mixing to obtain a dry material; dispersing carbon black and a dispersing agent in water to obtain carbon black dispersion liquid; and mixing the dry material, the carbon black dispersion liquid, a polycarboxylate superplasticizer and polyethylene fibers to obtain the carbon black doped concrete. The conductivity of the ECC concrete is improved through the carbon black, the ECC concrete is applied to the field of friction nano-generators, potential difference can be formed through extrusion of an automobile in the using process, and therefore current is output to supply power to traffic lights, monitoring equipment and the like.

The invention provides a cat litter low-temperature composite granulation preparation process based on natural sodium-based ore, and relates to the technical field of pet product manufacturing, and the cat litter low-temperature composite granulation preparation process comprises the following steps: S1, raw material treatment, including sodium-based ore and plant fiber treatment, S2, gradient mixing, including putting sodium-based ore, plant fiber and modified mineral materials in a preset proportion into stirring equipment for dry mixing; s3, carrying out low-temperature composite granulation, and carrying out segmented temperature control on a twin-screw extruder; S4, spraying a nano coating, and putting the particles into a fluidized bed, and adjusting the spraying pressure to 0.20-0.27 MPa; and S5, carrying out dynamic grading screening, and putting the particles sprayed with the nano coating into an intelligent dynamic grading screening machine. The natural sodium-based ore and the plant fibers are adopted as main raw materials, and the uniformity and the performance stability of components of the cat litter are improved through gradient mixing; the surface area of the three-dimensional honeycomb reticular particles formed by the low-temperature composite granulation process is increased, and the adsorption performance and the air permeability are improved.

The invention discloses road and bridge anti-heavy load concrete and a preparation method thereof, relates to the technical field of concrete technology, and belongs to the patent classification number C04B28 / 00. The preparation method of the concrete comprises the following steps: firstly, impregnating and activating polypropylene fibers with a potassium permanganate acid solution, then treating with aminopropyltriethoxysilane to obtain interface modified fibers, preparing a suspension from the interface modified fibers, mixing with a premixed solution of nano silicon dioxide containing a water-borne epoxy resin emulsion, and reacting to obtain a fiber reinforced composite material; the preparation method comprises the following steps: mixing metakaolin and silica fume, adding waterborne polyurethane and carboxylated multi-walled carbon nanotubes, carrying out high-speed shearing, carrying out spray drying to obtain interface reinforced microspheres, carrying out dry mixing on cement, machine-made sand, granite gravel, mineral powder and a fiber reinforced material, adding a polycarboxylic acid water reducer solution, carrying out high-speed stirring, adding the microspheres, and carrying out medium-speed stirring to obtain the concrete. The concrete prepared by the invention has excellent mechanical strength, so that the heavy load resistance is realized.

The invention provides a method and equipment for mixing powder. The method comprises the following steps: pretreating a material and introducing a liquid phase; dynamically shearing and dispersing; gradient heating and solvent evaporation; performing high-speed shearing to trigger fibrosis; the fiber structure is optimized through low-speed kneading; crushing the fiberized material; according to the method, a low-boiling-point solvent is introduced in the powder dry mixing process through a liquid-phase-assisted dry mixing-low-temperature solvent recovery-controllable fibration synergistic process, the powder mixing efficiency and uniformity are improved through a liquid phase, and after powder is mixed uniformly, condensate water of a stirring tank is closed, so that the temperature of a slurry intermediate semi-finished product is increased; and the stirring tank is synchronously vacuumized, so that the low-boiling-point solvent is boiled, low-boiling-point solvent steam is pumped into the condensation system, and the low-boiling-point solvent is recycled, so that uniformly mixed dry powder is obtained.

The invention belongs to the technical field of preparation of processed cheese, and particularly relates to flaky processed cheese and a preparation method thereof. According to the invention, a process of first dry mixing and then emulsifying salt ion exchange is adopted, and a formula design of high cheese and low fat content is matched, so that the phenomenon of grease separation of the product is solved, and the product has wiredrawing property; the problem that materials are caked in the pipeline is solved, the flowing property of the materials is guaranteed, the production efficiency is improved, and manpower and material resource cost is saved; the surface tension between water and fat is reduced, so that the processed cheese is stable in texture structure; the material filling property is improved, the probability that the product cannot be filled or is empty is reduced, and the finished product is fine in taste, free of particles, good in flavor, smooth and uniform in section and textured.

The utility model discloses a dry mixer convenient to clean, and relates to the technical field of dry mixers. The dough kneading device comprises a base, T-shaped plates are arranged on the two sides of the base in a sliding fit mode, a supporting plate is fixedly arranged on one side of each T-shaped plate in a matched mode, a clamping plate is elastically arranged on one side of each supporting plate in a sliding fit mode, a dough kneading box is arranged on the upper side of the base in a sliding fit mode, and one end of each clamping plate is matched with one side of the dough kneading box in a clamped connection mode. The U-shaped plate is fixedly matched with the upper side of the base, a dry mixing box is arranged on the upper side of the U-shaped plate, and the dough kneading box is located in the U-shaped plate. Through the arrangement of the clamping plate, one end of the clamping plate slides in and out of the dough kneading box under the action of a worker, and the dough kneading box is fixed and unfixed through one end of the clamping plate, so that the process that the dough kneading box slides out of the interior of the U-shaped plate is more convenient, and the process that the interior of the dough kneading box is cleaned is more convenient.